Put the sheet on a folded towel and punch lines with a wool needle (I didn’t say a knitting needle !…).
Keep main lines of the drawing.
Mark at most angles and intersections of lines.
Don’t forget any hole and press a little with your finger.
ESPECIALLY DON’T MOVE THE SHEET OF PAPER.
If you are right-handed start with the upper left corner (the upper right corner if you are left-handed).
This tuto shows you the error not to be made : use chocolate powder when you want to draw with a clear color (you can see every not covered dot…).
A better example : this dragon cake !
(Original post here ).